Peer-Reviewed Journal Details
Mandatory Fields
Mac Ardghail, P,Harrison, N,Leen, SB
2018
July
International Journal Of Fatigue
A through-process, thermomechanical model for predicting welding-induced microstructure evolution and post-weld high-temperature fatigue response
Published
WOS: 3 ()
Optional Fields
Finite-element Welding Fatigue Microstructure Constitutive POWER-PLANT STEELS RESIDUAL-STRESS IV FRACTURE SIMULATION SUPPRESSION JOINTS FIELD PIPE
112
216
232
This paper is concerned with the development of a modelling framework to predict the effects of welding and post-weld heat treatment on thereto-mechanical performance of welded material, as a step towards a design tool for industry. A dislocation mechanics, through-process finite element model, incorporating thermal, micro structural and mechanical effects is presented, for predicting thereto-mechanical fatigue of welds. The model is applied to multi-pass gas tungsten arc welding of 9Cr martensitic steel. The predicted high-temperature low cycle fatigue performance of cross-weld samples is comparatively assessed for a range of different post-weld heat treatment durations. It is shown that longer post-weld heat-treatment (PWHT) durations increase the predicted number of cycles to failure and that Vickers hardness gradient across the heat-affected zone can be used as an indicator of fatigue life.
10.1016/j.ijfatigue.2018.02.015
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